How to make page background transparent

I need to make a page background transparent to allow use as a transparent iframe on another site. Any guidance on how to go about inserting the css?

On Page Layout, in the style tab/ App background.
You click on New Palette and you put the background in transparency.
You name and you save.

You mean you type the words “in transparency” into the field where it asks for the hex code? :roll_eyes:

Second cursor on the left.

I ended up doing it using the RGB code for transparent because I still cannot see another way. Thank you though.